Ogre::RaySceneQuery Class Reference

Specialises the SceneQuery class for querying along a ray. More...

#include <OgreSceneQuery.h>

Inheritance diagram for Ogre::RaySceneQuery:

Public Member Functions
	RaySceneQuery (SceneManager *mgr)
	~RaySceneQuery () override
virtual void	clearResults ()
	Clears the results of the last query execution. More...
virtual RaySceneQueryResult &	execute ()
	Executes the query, returning the results back in one list. More...
virtual void	execute (RaySceneQueryListener *listener)=0
	Executes the query and returns each match through a listener interface. More...
virtual RaySceneQueryResult &	getLastResults ()
	Gets the results of the last query that was run using this object, provided the query was executed using the collection-returning version of execute. More...
virtual ushort	getMaxResults () const
	Gets the maximum number of results returned from the query (only relevant if results are being sorted) More...
virtual const Ray &	getRay () const
	Gets the ray which is to be used for this query. More...
virtual bool	getSortByDistance () const
	Gets whether the results are sorted by distance. More...
bool	queryResult (MovableObject *obj, Real distance) override
	Self-callback in order to deal with execute which returns collection. More...
bool	queryResult (SceneQuery::WorldFragment *fragment, Real distance) override
	Self-callback in order to deal with execute which returns collection. More...
virtual void	setRay (const Ray &ray)
	Sets the ray which is to be used for this query. More...
virtual void	setSortByDistance (bool sort, ushort maxresults=0)
	Sets whether the results of this query will be sorted by distance along the ray. More...
Public Member Functions inherited from Ogre::SceneQuery
	SceneQuery (SceneManager *mgr)
	Standard constructor, should be called by SceneManager. More...
virtual	~SceneQuery ()
virtual uint32	getQueryMask () const
	Returns the current mask for this query. More...
virtual const set< WorldFragmentType >::type *	getSupportedWorldFragmentTypes () const
	Returns the types of world fragments this query supports. More...
virtual WorldFragmentType	getWorldFragmentType () const
	Gets the current world fragment types to be returned from the query. More...
virtual void	setQueryMask (uint32 mask)
	Sets the mask for results of this query. More...
virtual void	setWorldFragmentType (enum WorldFragmentType wft)
	Tells the query what kind of world geometry to return from queries; often the full renderable geometry is not what is needed. More...
Public Member Functions inherited from Ogre::RaySceneQueryListener
virtual	~RaySceneQueryListener ()

Additional Inherited Members
Public Types inherited from Ogre::SceneQuery
enum	WorldFragmentType {   WFT_NONE , WFT_PLANE_BOUNDED_REGION , WFT_SINGLE_INTERSECTION , WFT_CUSTOM_GEOMETRY ,   WFT_RENDER_OPERATION }
	This type can be used by collaborating applications & SceneManagers to agree on the type of world geometry to be returned from queries. More...
Public Attributes inherited from Ogre::SceneQuery
uint8	mFirstRq
uint8	mLastRq

Detailed Description

Specialises the SceneQuery class for querying along a ray.

Constructor & Destructor Documentation

RaySceneQuery()

Ogre::RaySceneQuery::RaySceneQuery

(

SceneManager *

mgr

)

~RaySceneQuery()

Ogre::RaySceneQuery::~RaySceneQuery ( )

override

Member Function Documentation

clearResults()

virtual void Ogre::RaySceneQuery::clearResults ( )

virtual

Clears the results of the last query execution.

Remarks

You only need to call this if you specifically want to free up the memory used by this object to hold the last query results. This object clears the results itself when executing and when destroying itself.

execute() [1/2]

virtual RaySceneQueryResult& Ogre::RaySceneQuery::execute ( )

virtual

Executes the query, returning the results back in one list.

Remarks

This method executes the scene query as configured, gathers the results into one structure and returns a reference to that structure. These results will also persist in this query object until the next query is executed, or clearResults() is called. An more lightweight version of this method that returns results through a listener is also available.

execute() [2/2]

virtual void Ogre::RaySceneQuery::execute ( RaySceneQueryListener *  listener )

pure virtual

Executes the query and returns each match through a listener interface.

Remarks

Note that this method does not store the results of the query internally so does not update the 'last result' value. This means that this version of execute is more lightweight and therefore more efficient than the version which returns the results as a collection.

Implemented in Ogre::DefaultRaySceneQuery.

getLastResults()

virtual RaySceneQueryResult& Ogre::RaySceneQuery::getLastResults ( )

virtual

Gets the results of the last query that was run using this object, provided the query was executed using the collection-returning version of execute.

getMaxResults()

virtual ushort Ogre::RaySceneQuery::getMaxResults ( ) const

virtual

Gets the maximum number of results returned from the query (only relevant if results are being sorted)

getRay()

virtual const Ray& Ogre::RaySceneQuery::getRay ( ) const

virtual

Gets the ray which is to be used for this query.

getSortByDistance()

virtual bool Ogre::RaySceneQuery::getSortByDistance ( ) const

virtual

Gets whether the results are sorted by distance.

queryResult() [1/2]

bool Ogre::RaySceneQuery::queryResult ( MovableObject *  obj, Real  distance  )

overridevirtual

Self-callback in order to deal with execute which returns collection.

Implements Ogre::RaySceneQueryListener.

queryResult() [2/2]

bool Ogre::RaySceneQuery::queryResult ( SceneQuery::WorldFragment *  fragment, Real  distance  )

overridevirtual

Self-callback in order to deal with execute which returns collection.

Implements Ogre::RaySceneQueryListener.

setRay()

virtual void Ogre::RaySceneQuery::setRay ( const Ray &  ray )

virtual

Sets the ray which is to be used for this query.

setSortByDistance()

virtual void Ogre::RaySceneQuery::setSortByDistance ( bool  sort, ushort  maxresults = 0  )

virtual

Sets whether the results of this query will be sorted by distance along the ray.

Remarks

Often you want to know what was the first object a ray intersected with, and this method allows you to ask the query to sort the results so that the nearest results are listed first.

Note that because the query returns results based on bounding volumes, the ray may not actually intersect the detail of the objects returned from the query, just their bounding volumes. For this reason the caller is advised to use more detailed intersection tests on the results if a more accurate result is required; OGRE uses bounds checking in order to give the most speedy results since not all applications need extreme accuracy.

Parameters

sort	If true, results will be sorted.
maxresults	If sorting is enabled, this value can be used to constrain the maximum number of results that are returned. Please note (as above) that the use of bounding volumes mean that accuracy is not guaranteed; if in doubt, allow more results and filter them in more detail. 0 means unlimited results.

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The documentation for this class was generated from the following file:

• OgreSceneQuery.h